Jim 650, from the parts shown in the picture, renoel has the parts you need. I had a 750 with the front 59" snow blower and the 60" mid mount mower but that was 18 years ago. In renoel's picture the upper right and the far right items are not part of the PTO. They are parts of the mower deck attachments. You would only need the green item, electric clutch and T bar drive shaft, and the lower 2 black items. One is the front cover shield and the other one with the double pully is the pto itself. The pto bearing, and or bearings, I don't remember if they are 2 pc or not, are a plain bearing, probably SAE 660 bearing bronze. They can be replicated at most any tool shop. The PTO shaft itself is double ended one end for the front snow blower and the other end for the mid mount mower. Your crank pully should have 2 tapped bosses to accept the t bar drive shaft from the electric clutch. Have at it.